<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


    <!--  <h1> <h2> <h3> <h4> <h5> <h6> : 标题标签 -->
    <!--   -->

    <h1 align="right">h1</h1>
    <h2 align="center">h1</h2>
    <h3>h1</h3>
    <h4>h1</h4>
    <h5>h1</h5>
    <h6>h1</h6>

    <hr>
    h1
    <!-- <b>标签: 作用加粗    -->
    <b>h1</b>
    <!-- <i>标签: 作用倾斜   -->
    <i>h1</i>




</body>
</html>
